Exercise bike



FIG. 1 is a front and top perspective view of an exercise bike, showing my new design;

FIG. 2 is a rear and bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged view of a portion labeled, ‘FIG. 9’ in FIG. 1; and,

FIG. 10 is an enlarged view of a portion labeled, ‘FIG. 10’ in FIG. 2.

The broken lines in the figures illustrate portions of the exercise bike that fonn no part of the claimed design. The dash dot dash lines in FIGS. 1, 2, 9 and 10 are for the purpose of depicting the boundary lines of the enlarged views and form no part of the claimed design. 

CLAIM The ornamental design for an exercise bike, as shown and described. 